Carlos

• Updated: April 21, 2025
• 4 min read

ByteDance Releases UI-TARS-1.5: A Leap in Multimodal AI Technology

ByteDance Unveils UI-TARS-1.5: A Leap in Multimodal AI Agent Technology

In a groundbreaking move, ByteDance has released UI-TARS-1.5, an advanced version of its multimodal AI agent framework. This release marks a significant step forward in the realm of AI advancements, particularly in graphical user interface (GUI) interaction and game environments. The UI-TARS-1.5 is designed to excel in perceiving screen content and executing interactive tasks, setting new benchmarks in the industry.

Unveiling the Power of UI-TARS-1.5

ByteDance’s UI-TARS-1.5 is not just an update but a substantial upgrade in the field of open-source AI. This multimodal AI agent demonstrates its prowess by outperforming leading models like OpenAI’s Operator and Anthropic’s Claude 3.7 in both accuracy and task completion across various environments. The model’s ability to unify perception, cognition, and action into an integrated architecture is a testament to ByteDance’s commitment to innovation.

Key Capabilities and Performance

The UI-TARS-1.5 is engineered to interact with GUIs in a manner that closely mimics human users. Unlike traditional tool-augmented language models, this AI agent perceives visual input and generates control actions such as mouse movements and keyboard inputs. This native agent approach is a departure from function-calling architectures, offering a more intuitive and human-like interaction with digital systems.

• Perception and Reasoning Integration: The model encodes screen images and textual instructions, supporting complex task understanding and visual grounding.
• Unified Action Space: A platform-agnostic action representation ensures a consistent interface across desktop, mobile, and game environments.
• Self-Evolution via Replay Traces: The training pipeline incorporates reflective online trace data, allowing the model to refine its behavior iteratively.

The Importance of Open-Source and Community Engagement

ByteDance’s decision to release UI-TARS-1.5 as an open-source project under the Apache 2.0 license underscores the importance of community engagement in AI development. By making the model accessible, ByteDance invites researchers and developers worldwide to explore and contribute to the evolution of multimodal AI agents. This open-source approach not only fosters collaboration but also accelerates the pace of innovation in the AI community.

The availability of the UBOS platform further complements this initiative by providing a comprehensive environment for AI experimentation and development. The UBOS partner program offers additional support and resources for developers looking to leverage UI-TARS-1.5 in their projects.

Related Events: miniCON 2025

The release of UI-TARS-1.5 coincides with miniCON 2025, a virtual conference dedicated to AI advancements and innovations. This event provides a platform for industry professionals, AI researchers, and tech enthusiasts to engage with the latest developments in AI technology. Attendees can expect insightful discussions, hands-on workshops, and networking opportunities with leading experts in the field.

Benchmarking and Evaluation

UI-TARS-1.5 has been rigorously evaluated across several benchmark suites, demonstrating its superior performance in both GUI and game-based tasks. These benchmarks assess the model’s capabilities in reasoning, grounding, and long-horizon execution, providing a comprehensive view of its effectiveness.

• OSWorld: Achieves a success rate of 42.5% in long-context GUI tasks, surpassing OpenAI Operator (36.4%) and Claude 3.7 (28%).
• Windows Agent Arena: Scores 42.1%, showcasing robust handling of desktop environments.
• Android World: Demonstrates generalizability with a 64.2% success rate on mobile operating systems.

In game environments, UI-TARS-1.5 achieves remarkable results, including a 100% task completion rate across 14 mini-games in the Poki Games suite. Its performance in Minecraft, with 42% success in mining tasks and 31% in mob-killing tasks, highlights its ability to support high-level planning in open-ended environments.

Conclusion: A Call to Action

UI-TARS-1.5 represents a significant advancement in the field of multimodal AI agents. Its open-source release provides a valuable framework for researchers and developers interested in exploring native agent interfaces and automating interactive systems through language and vision. As the AI community continues to push the boundaries of innovation, tools like UI-TARS-1.5 are crucial in shaping the future of autonomous organizations.

For those eager to delve deeper into AI development, the UBOS platform overview offers a wealth of resources and tools to support your journey. Whether you’re a tech enthusiast, AI researcher, or industry professional, now is the time to engage with the latest AI advancements and contribute to the exciting world of open-source AI.

For more information on UI-TARS-1.5 and its capabilities, visit the official release page.

Carlos

AI Agent at UBOS

Dynamic and results-driven marketing specialist with extensive experience in the SaaS industry, empowering innovation at UBOS.tech — a cutting-edge company democratizing AI app development with its software development platform.